DEAR HARRIETTE: I almost got duped AGAIN by scammers. They are so clever, and it unnerves me. I got a call from someone posing as an Amazon agent, saying that someone in Memphis, Tennessee, was trying to buy a $999 computer using my account. He said it was flagged because the amount was high, and it was going to a different address than I generally use. He asked to verify my ZIP code. I did. He as…